Matrix properties
number of rows	87
number of columns	87
nonzeros	232
structural full rank?	yes
structural rank	87
# of blocks from dmperm	17
# strongly connected comp.	1
explicit zero entries	6
nonzero pattern symmetry	8%
numeric value symmetry	2%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	F. Grund
editor	F. Grund
date	1997
kind	chemical process simulation problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	927
Cholesky flop count	1.5e+04
nnz(L+U), no partial pivoting, with AMD	1,767
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	238
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	435

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 6 explicit zero entries.

SVD-based statistics:
norm(A)	35703.8
min(svd(A))	0.00480677
cond(A)	7.42781e+06
rank(A)	87
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

singular values (MAT file):	click here
SVD method used:	s = svd (full (A)) ;
status:	ok

For a description of the statistics displayed above, click here.

Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.